Unmarked graves

I have a close friend who is a Vietnam vet. He has been working on the Jennings cemetery where he knows there are many unmarked graves from years past. His desire is to set a grave marker with a "J" over each unmarked grave before is own passing. He attempted to hire a person with ground penetrating radar to mark areas where the ground has been disturbed but the cost was out of his reach. He hired a man to dowse the area but only found a couple areas. He ask me to come and dowse the areas and see if I got the same results at the prior person did (I'm no dowser but I have tried it a few times with 50/50 success rate. He has been working on this major project for several decades and historical records over 150 years ago are almost non-existent. I'm willing to help him if at all possible but I guess I need ideas.

Can you actually rent a ground penetrating device that would locate disturbed ground?
Options?
Ideas?

LIDAR maps may help along with close ground level observations with any vegetation closely cropped now that it is dormant. You could also use a probe to confirm suspect areas. I don't think it would be disrespectful given the motive.

Chris

The guy finally found a local business who does mapping with a ground penetrating device and is to help him within the next few days.

That should be interesting. Please let us know the results.

Chris